Salicon Technologies explains: UART HAT is an add-on board for Raspberry Pi which provides two additional RS232 Series TTL ports with flow control that are both 5V and 3.3V compatible with the original serial port on Raspberry Pi in kilobit speed range 115.2kbit as standard which is sufficient for ssh and small file transfers but it will take forever a big file for bertragen. So pretty sure it has something to do with UART and Bluetooth interference on my PI3. Incidentally. I already released the serial number with Raspi-config from the console. This is useful if you want to log in via the serial interface which means you can not use it in the programs the serial interface. To use the serial interface to connect to other devices and to communicate with them for example the reason for the changes is Bluetooth as described in pi 3 - How do I do serial work on the Raspberry PI3 - Raspberry Pi Stack exchange.Mini-UART has a big problem being bound to the system clock and since this varies to meet the processor requirements the baud rate changes to mini-UART. After the startup there will usually be a variable number seven or eight data bits an optional single-parity bit and finally one or two zero-stop bits. This prevents damage if two outputs are accidentally connected to each other for example when connecting TxD with TxD or when a GPIO input pin was unintentionally programmed as output. UART HAS is the add-on board for raspberry Pi the two additional RS232 series TTL ports in addition to the original serial port of raspberry PI.I connected to flow control which is both 5V and 3.3V compatible raspberry Pi ground pin to the ground pin of FTDI TX pin of raspberry Pi to RX pin of FTDI and vice versa. The award of the Raspberry Pi pin is available here. Then I installed on my Ubuntu laptop Minicom sudo apt-get install minicom and started it with.
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November 2018
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